CN201593993U - Trace gas flowmeter for testing permeability of low-leakage stone - Google Patents
Trace gas flowmeter for testing permeability of low-leakage stone Download PDFInfo
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- CN201593993U CN201593993U CN2010200467497U CN201020046749U CN201593993U CN 201593993 U CN201593993 U CN 201593993U CN 2010200467497 U CN2010200467497 U CN 2010200467497U CN 201020046749 U CN201020046749 U CN 201020046749U CN 201593993 U CN201593993 U CN 201593993U
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- gas flowmeter
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Abstract
The utility model relates to a trace gas flowmeter for testing the permeability of low-leakage stone, which is applied to testing the air permeability of stratum stone. The trace gas flowmeter mainly comprises a flow interceptor, a communicating pipe, an air inlet pipe and a U-shaped transparent pipe, wherein one end of the U-shaped transparent pipe is connected with the communicating pipe, and the U-shaped transparent pipe is communicated with the communicating pipe. The other end of the communicating pipe is fixed with the flow interceptor. The middle of the communicating pipe is connected with the air inlet pipe, and the air inlet pipe is communicated with the communicating pipe. The trace gas flowmeter has the effects of being capable of testing the instantaneous flow rate of air of the low-leakage reservoir stratum stone sample, and meeting the requirement on testing the sample of the low-leakage reservoir stratum stone. By trying the trace gas flowmeter, environment, system and personal errors are reduced, the testing result is accurate, the repeatability is good, and the working efficiency is improved.
Description
Technical field
The utility model relates to the petroleum exploration and development technology, particularly carries out the device of formation rock measuring gas permebility in the laboratory, is a kind of flow measurement device that measures gas by the rock instantaneous delivery.
Background technology
When the test rock gas permeability, need the gas flow of metering by rock sample.Can the minimum gas flowmeter be particularly important in the measuring gas permebility of hypotonic rock sample, and the minimum gas flowmeter influences the measuring gas permebility result, measure gas permeability for hypotonic sample and play decisive role.At present, soap film flowmeter is to test the classical gas measurement device that rock gas permeability uses both at home and abroad, can promote the flow velocity of vacuolar membrane at different tube diameters by gas, is converted into the flow of unit interval.The shortcoming of soap film flowmeter is: (1) material is prepared many, and different permeability rock samples need be changed the flowtube of different tube diameters; (2) test procedure complexity; (3) sample test labour intensity is big.
The service property (quality) flowmeter can be tested rock gas permeability equally.Mass flowmeter measurement of discharge meter automaticity height, but still have its deficiency: (1) external environment influence measurement result, as under the stable situation of voltage, obtaining measurement result accurately; (2) the stable convection current measurement accuracy of measurement influence of electronic original part is bigger, especially in the low discharge test.(3) the mass flowmeter minimum measurement accuracy of existing market sale is 10ml/min.Test hypotonic rock sample to the accuracy requirement of flowmeter below 1ml/min, mass flowmeter can not satisfy the test request of hypotonic rock sample.
The utility model content
The purpose of this utility model is: a kind of minimum gas flowmeter of testing hypotonic rock permeability is provided, utilize the gas of different flow to enter the minimum gas flowmeter, can make the certain water-head of liquid generation in the U-shaped transparent tube two ends, utilize U-shaped transparent tube two ends water-head, converting draws the gas instantaneous delivery.Solve low, the ineffective problem of measuring accuracy that exists in the test of low permeability reservoir rock sample conventional gas permeability, satisfy low permeability reservoir rock sample test needs, reduce labour intensity, increase work efficiency.
The technical solution adopted in the utility model is: the minimum gas flowmeter of testing hypotonic rock permeability, mainly form by intercepting sewer, cross over pipe, draft tube and U-shaped transparent tube, it is characterized in that: the end in the U-shaped transparent tube is connected with cross over pipe, U-shaped transparent tube and cross over pipe UNICOM.Other end internal fixation at cross over pipe has intercepting sewer.Middle part at cross over pipe is connected with draft tube, draft tube and cross over pipe UNICOM.Minimum gas in test process enters cross over pipe by draft tube, and gas is subjected to certain resistance during by intercepting sewer, can make to produce certain pressure in the cross over pipe, and the liquid level at U-shaped transparent tube two ends is changed.And according to the principle of the corresponding certain flow of certain pressure value, the flow that different pressure is corresponding different is observed U-shaped transparent tube two ends level change situation.The minimum gas flowmeter can be measured the functional relation of rock sample gas permeability under the different pressure, flow, water level reading by after demarcating, and tries to achieve the corresponding different flow of different water level readings.
The diameter of U-shaped transparent tube is between 4～8 millimeters; The height of U-shaped transparent tube is between 750～950 millimeters.There is scale at U-shaped transparent tube two ends.
By changing the diameter of intercepting sewer, control minimum gas flow size.The internal diameter of intercepting sewer is between 0.02～0.1 millimeter.
The beneficial effects of the utility model: the utility model is tested the minimum gas flowmeter of hypotonic rock permeability, can test low permeability reservoir rock sample gas instantaneous delivery.Satisfy low permeability reservoir rock sample test needs.By trying out of minimum gas flowmeter, reduced environment, system and personal error, measurement result is accurate, and good reproducibility has reduced test labour intensity, increases work efficiency.
Description of drawings
Fig. 1 is the minimum gas flowmeter structure diagrammatic cross-section that the utility model is tested hypotonic rock permeability.
Among the figure, 1. intercepting sewer, 2. cross over pipe, 3. draft tube, 4.U shape transparent tube.
Embodiment
Embodiment 1: the minimum gas flow with a hypotonic rock permeability of test is counted example, and the utility model is described in further detail.
Consult Fig. 1.The utility model is tested the minimum gas flowmeter of hypotonic rock permeability, mainly form by intercepting sewer 1, cross over pipe 2, draft tube 3 and U-shaped transparent tube 4, it is characterized in that: the end in U-shaped transparent tube 4 is connected with cross over pipe 2, U-shaped transparent tube 4 and cross over pipe 2 UNICOMs.Other end internal fixation at cross over pipe 2 has an intercepting sewer 1.The diameter of intercepting sewer 1 is 0.05 millimeter.Be connected with draft tube 3 at the middle part of cross over pipe 2, draft tube 3 and cross over pipe 2 UNICOMs.
The diameter of U-shaped transparent tube 4 is 5 millimeters; The height of U-shaped transparent tube 4 is 800 millimeters, and U-shaped transparent tube 4 two ends have the scale of 800mm liquid-column height respectively.
The minimum gas flowmeter hypotonic ooze in the sample gas permeability test particularly important, it not only influences gas permeability result's precision, and can measure for hypotonic and special hypotonic sample and to have played deciding factor, from following formula as can be seen, except gas flow, all the other parameters that influence gas permeability can record by usage devise a stratagem measuring device tool.The development of minimum gas flowmeter has remedied the defective that soap film flowmeter, mass flowmeter can not adapt to minimum flow.The minimum gas flowmeter minimum flow of testing hypotonic rock permeability can reach 0.00375ml/s.
K
a＝(2×Q
o×P
a×μ×L)/A×(P
1 2-P
2 2)
K
a-air permeability, mD;
Q
o-gas flow, ml/s
P
a-atmospheric pressure, MPa;
μ-gas viscosity, mPa.s;
The L-sample length, cm;
A-sample end area, cm
2
P
1, P
2The absolute pressure (revision of the convention is to two-decimal) of---be respectively entrance and exit, MPa;
The gas of experiment acquisition is inserted draft tube 3 porch of the minimum gas flowmeter of the hypotonic rock permeability of test; Gas enters flowmeter, and gas flows out from intercepting sewer 1 center pit.Because the effect of intercepting sewer 1 can produce certain pressure when gas passes through, on U-shaped transparent tube 4, produce certain water-head like this, by the demarcation of reference instrument, the flow that certain water-head is corresponding certain.When pressure stability, the gas flow by sample also is stable, so just can measure the flow of gas by sample.
Throughput ratio under the unit pressure of various flowmeters
See that from last table the minimum gas flowmeter of being developed compares precision height, simple to operate, the error effect that not brought by timing with soap film flowmeter; Compare with mass-flow gas meter, test the good stability of the minimum gas flowmeter of hypotonic rock permeability, it is little to fluctuate.
Claims (3)
1. the minimum gas flowmeter of the hypotonic rock permeability of test mainly is made up of intercepting sewer (1), cross over pipe (2), draft tube (3) and U-shaped transparent tube (4); It is characterized in that: the end in U-shaped transparent tube (4) is connected with cross over pipe (2), U-shaped transparent tube (4) and cross over pipe (2) UNICOM, other end internal fixation at cross over pipe (2) has intercepting sewer (1), be connected with draft tube (3) at the middle part of cross over pipe (2), draft tube (3) and cross over pipe (2) UNICOM.
2. the minimum gas flowmeter of the hypotonic rock permeability of test according to claim 1 is characterized in that: the diameter of U-shaped transparent tube (4) is between 4～8 millimeters; The height of U-shaped transparent tube (4) is between 750～950 millimeters, and U-shaped transparent tube (4) two ends have scale respectively.
3. the minimum gas flowmeter of the hypotonic rock permeability of test according to claim 1 is characterized in that: the internal diameter of intercepting sewer (1) is between 0.02～0.1 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200467497U CN201593993U (en) | 2010-01-08 | 2010-01-08 | Trace gas flowmeter for testing permeability of low-leakage stone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200467497U CN201593993U (en) | 2010-01-08 | 2010-01-08 | Trace gas flowmeter for testing permeability of low-leakage stone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201593993U true CN201593993U (en) | 2010-09-29 |
Family
ID=42776061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200467497U Expired - Lifetime CN201593993U (en) | 2010-01-08 | 2010-01-08 | Trace gas flowmeter for testing permeability of low-leakage stone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201593993U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575631A (en) * | 2013-11-06 | 2014-02-12 | 河海大学 | Rock permeability testing system and testing method |
| CN104020096A (en) * | 2014-06-20 | 2014-09-03 | 青岛理工大学 | Device and method for detecting pore pressure by U-shaped pipe hydraulic difference method |
| CN104215282A (en) * | 2013-05-30 | 2014-12-17 | 中国石油化工股份有限公司 | Gas flow measuring device and method for measuring gas flow using same |
| CN104359819A (en) * | 2014-11-10 | 2015-02-18 | 中国石油天然气股份有限公司 | Device and method for determining gas-water relative permeability of low-infiltration dense rock core |
| CN106596374A (en) * | 2016-12-19 | 2017-04-26 | 徐州医科大学 | Gas permeability detecting device and determination method for tissue engineering porous scaffold |
-
2010
- 2010-01-08 CN CN2010200467497U patent/CN201593993U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215282A (en) * | 2013-05-30 | 2014-12-17 | 中国石油化工股份有限公司 | Gas flow measuring device and method for measuring gas flow using same |
| CN104215282B (en) * | 2013-05-30 | 2017-10-27 | 中国石油化工股份有限公司 | Equipment for measuring gas flow rate and the method that measuring gas flow rate is carried out using the device |
| CN103575631A (en) * | 2013-11-06 | 2014-02-12 | 河海大学 | Rock permeability testing system and testing method |
| CN103575631B (en) * | 2013-11-06 | 2015-10-07 | 河海大学 | Rock permeability test macro and method of testing |
| CN104020096A (en) * | 2014-06-20 | 2014-09-03 | 青岛理工大学 | Device and method for detecting pore pressure by U-shaped pipe hydraulic difference method |
| CN104020096B (en) * | 2014-06-20 | 2016-04-27 | 青岛理工大学 | U-shaped pipe hydraulic pressure difference rope method detects the devices and methods therefor of pore pressure |
| CN104359819A (en) * | 2014-11-10 | 2015-02-18 | 中国石油天然气股份有限公司 | Device and method for determining gas-water relative permeability of low-infiltration dense rock core |
| CN106596374A (en) * | 2016-12-19 | 2017-04-26 | 徐州医科大学 | Gas permeability detecting device and determination method for tissue engineering porous scaffold |
| CN106596374B (en) * | 2016-12-19 | 2019-01-18 | 徐州医科大学 | A kind of device for checking air permeability and measuring method of tissue engineered porous scaffold |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100929 |
|
| CX01 | Expiry of patent term |